def testGetNextMemoryAddressWithParentContext(self):
parent = Context()
context = Context(parent)
address0 = toMemoryAddress(0)
address1 = toMemoryAddress(1)
address2 = toMemoryAddress(2)
address3 = toMemoryAddress(3)
self.assertEqual(address0, context.getNextAddress())
parent.varsByAddress[address0] = Variable("var1", address0, Context())
self.assertEqual(address1, context.getNextAddress())
parent.varsByAddress[address2] = Variable("var2", address2, Context())
self.assertEqual(address1, context.getNextAddress())
parent.varsByAddress[address1] = Variable("var3", address1, Context())
self.assertEqual(address3, context.getNextAddress())
del parent.varsByAddress[address0]
self.assertEqual(address0, context.getNextAddress())
def testDestroyWithoutParent(self):
context = Context()
result = context.getVariable("var1")
context.destroy()
self.assertEqual(result, context.getVariable("var1"))
def testDestroyAtMultipleLevels(self):
root = Context()
context1 = Context(root)
context2 = Context(context1)
result = context2.getVariable("var2")
context2.destroy()
self.assertFalse(result == context2.getVariable("var2"))
def testGetVariableWithParentContext(self):
parent = Context()
context = Context(parent)
result1 = parent.getVariable("var1")
result2 = context.getVariable("var1")
result3 = context.getVariable("var2")
result4 = parent.getVariable("var2")
self.assertTrue(result1 == result2)
self.assertFalse(result3 == result4)
def testGetVariableWithoutParentContext(self):
context = Context()
result1 = context.getVariable("var1")
result2 = context.getVariable("var2")
result3 = context.getVariable("var1")
for result in [result1, result2, result3]:
self.assertFalse(result is None)
self.assertTrue(result1 == result3)
self.assertTrue(result1 != result2)
def testDestroyWithParent(self):
parent = Context()
context = Context(parent)
result1 = parent.getVariable("var1")
result2 = context.getVariable("var2")
context.destroy()
self.assertTrue(result1 == parent.getVariable("var1"))
self.assertFalse(result2 == context.getVariable("var2"))
def testStartChildContextProducesContextWithCurrentContextAsParent(self):
parent = Context()
child = parent.startChildContext()
self.assertEqual(parent, child.parent)